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A235260 Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise 1

%I #4 Jan 05 2014 12:39:00

%S 22500,2691067,417967682,41170730836,3998547995093,282203684810984,

%T 19728773908721866,1090479569705332324,59978597869556298802,

%U 2740097672205395658455,124802366974771368162608

%N Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise

%C Column 3 of A235261

%H R. H. Hardin, <a href="/A235260/b235260.txt">Table of n, a(n) for n = 1..31</a>

%e Some solutions for n=1

%e ..1..0..1..2....1..0..3..3....1..1..2..2....1..2..3..2....0..3..2..3

%e ..3..1..3..2....2..3..3..0....3..0..3..3....0..1..3..3....0..0..1..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 05 2014

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Last modified March 4 10:03 EST 2024. Contains 370528 sequences. (Running on oeis4.)